Carbureter-valve.



J. F. DURYIEIA.v

GARB'URE'TBR VALVE. APPLIUATION IK'ILBD' IAB. 12, 1912.

- 1,100,291.- 1 'Patented .111119151914 I I pw@ CA RBRETERALV'W.

specification o .letters Paiemratenteu .nine is, gioie.

Application filed Merch 35.*, 1912. Serial No. 6331.217.

an enlarged head 17 at its upper portion provided with loifurcated arms'1S having apertures 19 therein through which may be passed a pivot topivotally secure seid .needle Valve l to a moving means such asa. lever.l have shown my needle valve l5 us terminating et its other extremity ine shank 20. rlhis s iank 2O is formed thereon for convenience in,cutting the body 16 of the needle valve 15 to the shape desired and mayhe ground oil to conse the lower extremity of the needle valve 15 toterminate, as

To all fic/icm it' may concern Be it lniown their l, JAMES F. Domini, acitizen of the United States, residing at] Springfield, in the county oflflempden and Sttte of lilassichusetts7 have invented con] tain nev.7and useful linproveinents in (lore Someter-Valves, of which thefollowing is a. specification.

'.lhis invention relates to improvements in curhureter valves.

lt has for its object the construction of! an improved valve oi the typeknown as! needle valves for use in connection with I indicated by thedotted line 2l, if so' despi'ay nozzles oi.' the type of carburetor mostl sired.

used in the present gus engine practice. The valve 15 and spray nozzle11 prefer- A. further object of this invention is to provide a needlevalve for use in connection with a. spray nozzle which will give adeliiiil'e increase of g'asolene supply for equal l ,shown in Fig. '1 ofthe drawings. The valve 15 is normally adapted to loe movedlongitudinally of said axis out of said spray nozzle 11, as will beapparent in the drawings. l have constructed I my body valve 16v in suchWay that for successive equal movements of said needle I valve 15 intoor out of said spray nozzle 1l either into or movements of the needlevalve.

Other objects of my invention will he apparent :is set forth in thefollowing specilication sind accompanying drawings, in Which-w Figure 1is a side elevation of my 1mproved needle valve and it section of partoin` the nozzle in connection therewith; Fig. 2, cross section on theline 2, Q of Fig. 1; and 3, e diagrammatic View showing"A the method ofplotting,r the curve for the form shown..

'Lilie numerals and reference letters refer to like elements throughoutthe drawings.

10 cle/sig. etes a conventional form of supply tube terminating in aspray nozzle 1.1, as shown in Fig. 1. in employment of this spraynozzle, liquid normally automatically kept at a certain level hy a iioator other means not shown., and air rushing through a surrounding intakepipe and' around said supply tube 10 and spray nozzle 11 causes theamount of gasolene or other `uel to he drawn out of said spray nozzle lund mined with the nii'. The amount of I solene drawn out will obviouslyhe increased or decreased the opening l2 is I the successive annularopenings at 12 will he proportionally increased or decreasedrelsnectively. This ratio of increase or decrease may lie chosen toprovide for the most I elicient anoV economical operation of aoarliuietei'. In my experience, however, I have l found that this ratioof increase gives good results when' euch successive annular open ing byone-tenth of the annular equal to 1/28 the total That is, for a movement16 from the position shown in Figs. i vand 2 to the next a, to point 5,)the annular opening zit-12 will .be increased by one-tenth. In otherWords.y as shown in Fig. 2, the annular opening' 12 is increased by theslight annular opening;` indicated ted circle b and the full line circlea repmovement thereof.

valve body 16 through the points o und l. By thus propoitioning thevalve holly it obvious that a construction much more uflmntutq'eous than'that yordinarily used is provided, since it is readily apparent whenthe conical form of needle vulve is used equal successive movements ofthe conical vulve7 outwardly for 'example7 Will give increased ordecreased. To regulate the size this openin f' has been common pineticeto provide a Jalve terminating in n conn-nl point and adopted to closesaid spiny noz zle at one extremity of its movement und ci.- 5 tirelyopen the same its other extremity.

ln my improved .fleif'ice l provide a neel die valve having the valvebody 16 with ably have a common longitudinal axis, as'Y as lying'between the dot` successive opening, (from point.

ing at 12 diilers from the preceding operek opening j upon alongitudinal nioyenientof the valve G0 of the valveloody.

resenting the successive cross sections oi' the 100 longitudinal crosssection, as indicated by the outer periphery of the body 16 in Fig. 1,will'be a curve convex with respect to the lines d and e drawn from themaximum diameter at o in Fig. 1 to the point of minimum diameter, asindicated at f in the construction shown in Fig. 1. In other words, *thesides of a cone having for its base the maximum cross section at ,c ofthe needle valve 15 and havingsides passing through 2G the point ofminimum cross section, that is at the point f in the construction shown,will lie-wholly within the body 16 of the needle valve 15. Also, thelongitudinal cross section of the body 16 of the valve 15 will be convexwith respect to a cone situated as abovestated: If the body 16 wereground or cut o at the lower extremity, as indicatedr along the dottedline 21, the contour of the longitudinal cross section of theV needlevalve in that form would show` a completed figure, following outtheformula Jfor designing the same. When Athe shank 20 is allowed to`remain at the lower extremity l of thevalve, 15, the spray nozzle 11 isso constructed as to give a maximum opening therethrough ,for theservice intended when llthe shank 2Ov lies in such'nozzle, that is,when' ,thebodyl A16 of the valve 15 is in its rriaximuml openingpo-sition.

tot In Fig. '3 I'have shown the curve plotted "ttor the form asillustrated in Figs. 1 and 2,

the revolution of which, about its longitudinal axis,V will give' theconfiguration of the body'l of 4the valve 151 as shown in Fig. 1.

Itisto'be noted that in these figures I have shown the lSpray nozzle ingreatly exaggerated' xterm. The successive longitudinal movements I haveshown in constructing this illustrated form are approximately 1/28 ofthe total movement of the valve, although this may .be varied. Thesuccessive annular openings vary about 1/10 of each preceding opening,for the amount .of longitudinal movement chosen in this case asindicated by the series of successive values in the dia grammaticshowing of Fig. 3. It is to be noted-that while in the drawings haveshown the successive longitudinal movements as of a certain distance andthe total movement divided in 28 steps, these are arbitrarily selectedhere to aid in establishing one form of the valve for a certain ratio ofincrease. It is obvious that this form may be varied to comply withdesired variations or conditions.

It is believed that the purpose and operation of my improved device ismade suiliciently clear in the above specification to obviate therequirement of any further description. I do not desire to restrictmyself to the exact form or dimensions shown in the drawings beyond thescope of the ap# pended claims.

I claim:

1. The combination of a spray nozzle having a circular aperture, and aneedle valve adapted to move in and out of said aperture, said needlevalve being so designed that for successive equal movements thereofsuccessive annular openings between said valve and said spray nozzlewill be increased or decreased in a definite ratio.

2. The combination of a spray nozzle having a circular aperture, and aneedle valve adapted to move in and out of said aperture to regulate theamount of gasolene iiovving therethrough, said needle valve having itslongitudinal axis in common with that of the spray nozzle and beingadapted to move longitudinally of said axis, the body of said needlevalve being so constructed that 'for successive equal movements thereofthe successive annular openings between said valve l and said spraynozzle will be increased or decreased in a definite ratio,

In testimony whereof, I have subscribed mynaine. JAMES F. DURYTC.

" V'Vitnesses LILLIAN BEAUDREAU, JOSEPH It. GoULD.

